Telephone-transmitter.



s. A. KOLTONSKI. TELEPHONE TRANSMITTER. APPLICATION TILED MAY 23, 1907.

Patented Am 25, 1911.

m J w 0 u v mm /W UNITE OFFICE.

STANISLAXV A. KOLTONSKI, OF BOSTON, MASSACHUSETTS TELEPHONE-TRANSMITTER.

Specification of Letters Patent.

Patented Apr. 25, 1911.

Application filed May 23, 1907. Serial No. 375,246.

. in connection with the accompanying drawing, is a specificatioln-like letters on the drawing representing like parts.

This invention relates to telephone transmitters, and has for its object to improve the construction of the transmitter, all as more fully hereinafter descr bed and then pointed out in the claims.

' In the drawings Figure l is a horizontal sectional view through a transmitter embodying my invention; Fig. 2 is a detail of the diaphragm support and bridge; Fig. 3'

is a view of the damper spring employed;

Fig. 4 is a sectional view showing a modified form of the invention.

The transmitter herein shown comprises the usual sormd-trans'mitting diaphragm 3, the electrode 4 connected thereto, the opposite or opposing electrode 5, and the variable resistance 6 interposed between said electrodes said variable resistance being of any suitable character such as granulated carbon, and being contained in 'a carbon-receiving chamber of usual construction.- These parts are or .body 9, and is held in position a damper spring 10 which is of the damper spring rest.

may be,all as usually found in transmitters and form no part of my present invention.

The diaphragm 3 is supported upon the inner face of the flange 8 of the frame or by means of of the shape shown in Flg. 3.

Rigidly secured to the frame 9 or integral therewith is the bridge 11 in which the insulated stem 12 of the electrode 5 is adjustably secured and against which the ends 14 Said damper spring is shown as having the circular body 15 which surrounds the connection between the electrode 4 and the diaphragm 3 and bears against the central portion of the diaphragm, and the two arms 16 that are bent inwardly and rest against adjustable 2 the bridge 11 is so placed from the left, the two the diaphragm 3 may.

sides of the bridge being spaced substantially 180 apart on this side. The frame .lwith its connected bridge and the parts suppoltcd thereby are received within :1 casing 58 of any suitable construction and are held therein by screws 19. i The frame 9 is in the form of an annular ring, as best seen in Fig. 2, and the open front of the frame is closed by a front plate 201 which carries the usual mouth-piece 22, suid'mouth-piece being either integral with the front plate or detachable therefrom as desired. This front plate 20 is shown as provided with a flange 21 which is scrcw-tln'eaded to the casing 58 by reason of which construction said frontplate can be readily removed from the cats ing. It will be noted that the sound-trans mitting diaphragm rests againstthe inner face of the flange S and is held thereto by the damper spring and not in-any way by the front plate 20. As a result the removal oi. the front plate does not in any way affect the diaphragm or other delicate parts of the instrument, and said front plate can be readily removed orreplaccd without danger of disturbing the delicately adjusted parts of the instrument." The frame 9 is preterably provided with the annular flange which overlies the edge of the casing 58 am is clamped thereto by the front plate 20, as plainly seen in Fig. 1.

23 -is an auxiliary diaphragm which is situated in front of. the soundtransmitting diaphragm 3 and which is held in place by having its edges clam ed between the flange S of the frame 9 and a clamping ring- 59 which is held in place by the front plate This clamping ringis preferably provided with a notch to receive a lug 60 on the frame, whereby the ring is held from turning when the front plate is screwed into place. By thus holding the ring 55) from turning, all

darwer of injuring the auxiliary diaphragm Geived in bearings formed in brackets 31' that are secured to the back 35 of a box or casing on which the transmitter is mounted. 30 is the front of this box or casing, and where this construction is used said front will have an aperture therein large enough to receive the transmitter, and said front may be detachably secured to the back; in any suitable way. IVhere this construction is used the transi'nitter is received within the box and stands substantially flush with the front thereof and it will be substantially flush in all adjusted positions.

In Fig. at I have shown another way of mounting my transmitter in accordance with my invention. This figure shows a vertical section through a box or housing for the.

transmitter, the front of the box being desig nated by 30. The casing 58 is made substantially hemispherical in shape and is received within a hemispherical support 63 which is secured to the back of the casing by suitable brackets 64 The hemispherical support (33 has a slot 66 therein through which projects a finger or tail-piece 67 extending from the'casing 58. Secured to the end of the finger is a spring 69 which is wider than the slot anduvhich bears against the back side of the support '63, said spring serving to yieldingly hold the casing 58 of the transmitter within the supporting member 03.

I have illustrated and described two embodiments only of my invention and have not attempted to show all forms in which it may be embodied. 1

claim as new and desire to secure by Letters Patent is 7 1. In a telephone trans1nitter,the combination with an annular frame or support having a two-armed bridge integral therewith, the median line of both arms of the bridge being located on the same side of a diametrical line through said frame, of a diaphragm situated between the bridge and the frame, and a variable resistance supported partly by the bridge and partly by the diaphragm.

2. In a telephonetransmitter, the combination with a frame or support, of a soundtransmitting diaphragm sustained thereby, an auxiliary diaphragm also sustained thereby, a non-rotatable clamping ring for clamping the auxiliary diaphragm in position, and a front plate 20 secured to the frame and operating to hold the clamping ring in place.

In a telephone transmitter, the combination with a frame having a bridge integral therewith, a diaphragm sustained by said frame and bridge, a casing inclosing the frame and bridge, and a front cover screwed to the casing and clamping the frame to the casing.

4'. In a telephone transmitter, the combination with a frame having a bridge integral therewith, a diaphragm sustained thereby, a casing inclosing the frame, screws for securing the casing to the frame, said screws having projecting trunnion portions and brackets in which the trunnion portions of the screws are rotatably mounted.

I name to this specification, in the presence of two subscribing witnesses. STANISLAVV A..-KOLTONSKI.

\Vitnesses LOUlS C. SMrrH,

JOHN C. EDWARDS.

'Having described my invention What I In testimony whereof, I have signed my 

